Balloon Belly Molly
Balloon Belly Molly gets their name from their trademark shape, which makes them appear to look overweight. They are available in white, black, and yellow and have a lyre-shaped back fin. Balloon Belly Molly is a friendly breed that likes to the company of similarly sized fish. It only grows to about 3 inches, but it still wants to have an aquarium larger than 30 gallons.